The investigation team took life quickly. Khan knew his students well, so he already had a list of potential candidates for the mission. He only had to decide how many to bring in the Slums, but Cora and Amber helped outline those details.
The day before the departure set by the Global Army, Khan sent a series of messages where he explained the nature of his offer and what it would involve. He didn't expect the chosen students to accept right away, but it turned out that their families had nothing against the mission in the Slums. They actually encouraged their descendants.
Khan became only busier afterward. He had to visit Headmaster Pitcus' office to convey the list of his team and finalize the last steps for the mission. Then, he had to exchange calls and messages with the representatives of the involved families.